Does Running Burn Belly Fat? What the Studies Show
You can't pick where fat comes off. But running can change the belly fat you can't see, even when the scale stays put.
Yes, over time. Running can't pick where fat leaves from, but exercise can shrink the deep fat around your organs, even when the scale doesn't move.
In a 2023 trial in Trondheim, eight overweight men spent ten weeks adding crunches and torso rotations to their treadmill sessions, four days a week. Eight others just ran. Both groups burned about the same energy.
The crunch group lost about 700 grams more fat from the trunk. Total fat loss didn't differ between the groups. It's a rare result, it came from 16 people, and none of them were women.
Does running burn belly fat?
Yes, slowly, along with fat from everywhere else. Most researchers doubt you can choose where fat comes off, and that one small trial doesn't settle it. What running can do is change the fat you can't see.
The two kinds of belly fat
Subcutaneous fat sits under your skin. It's the part you can pinch.
Visceral fat sits deeper, around your liver and gut. This is the one doctors worry about, because it's linked with heart disease and type 2 diabetes. You can't see it in a mirror.
Why the scale can miss it
A review of 117 studies and 4,815 people compared exercise with dieting. Dieting won on the scale. But when people's weight didn't change, exercise still cut visceral fat by 6.1%, while dieting barely moved it, at 1.1%.
That review covers exercise training in general, not only running. Still, it means a flat line on your scale doesn't prove nothing is happening.
How much running does it take?
The best-known numbers come from Duke University. They took 170 sedentary, overweight men and women for eight months and asked them not to change their diet.
In the group who didn't exercise, visceral fat rose 8.6%, and for the women in that group it rose 11.6%. People who walked or jogged about 11 miles a week saw no significant change. People who jogged about 17 miles a week lost 8.1%.
Seventeen miles is not a week-one number, so don't treat it as a target. Look at the first group instead. Eight months of no exercise had a measurable cost.
What about menopause?
Women often hear that belly fat arrives after menopause. A four-year study of women in midlife found something else: visceral fat climbed in the years before menopause, then stayed fairly stable for the first year or two after it.
That study watched women over time, so it can't say what caused the rise. It does suggest that the years before menopause are a good time to already be moving.
What to do this week
1. Run slowly, or walk and run
You need sessions you can repeat for months, and hard ones rarely last that long. Slow down until you can talk in full sentences. Walk breaks count.
2. Keep the miles, whatever the speed
In the Duke trial, 11 miles of walking and 11 miles of jogging gave the same result. Pick the one you'll still be doing in March.
3. Add strength twice a week
Dieting without lifting costs you muscle, and running alone won't protect it. The Skinny Trap covers three movements you can do at home.
Do sit-ups burn belly fat?
They build the muscle underneath. The Trondheim trial is the main sign they might do a little more than that, and it studied 16 men doing far more than a few sit-ups.
Is walking or running better for weight loss?
Per mile, the Duke trial found no difference in visceral fat. Running covers those miles in less time. Walking is easier to keep up, and for a lot of people that matters more.
How long until I see a difference?
Nobody can give you a date. Duke measured at eight months, and visceral fat doesn't show up in a mirror anyway.
Where to start
Molorun's Level 1 is six sessions, free, built around minutes rather than miles. Or lace up and go out for ten. Leave the scale in the bathroom.
Scientific Sources
- Brobakken MF et al. (2023), Physiological Reports. Abdominal aerobic endurance exercise reveals spot reduction exists: A randomized controlled trial.
- Verheggen RJHM et al. (2016), Obesity Reviews. A systematic review and meta-analysis on the effects of exercise training versus hypocaloric diet.
- Duke Health (2003). Physical inactivity rapidly increases visceral fat; exercise can reverse accumulation. Summary of the STRRIDE trial.
- Lovejoy JC et al. (2008), International Journal of Obesity. Increased visceral fat and decreased energy expenditure during the menopausal transition.
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